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REFRACTION
it bends
bends upward
Normally, you would need adiamond or a diamond shaped glass piece. You can also use a sphere-shaped magnifying glass.
Refraction bends the light, making the straw appear to be broken.
REFRACTION
prism
A lens is a curved glass that refracts or bends light rays. The two principal types of lenses are convex and concave.
glass bends light
The blue light is refracted more.
A lens
it bends
It bends in water or a magnifying glass.
bends upward
Mirror (uses reflection principle), transparent glass sheet (uses refraction principle),etc are the instruments which are used to bend light.
It doesn't water refracts or bends the light which is why the straw looks bent in a glass of water
Light is affected by everything it touches. If it touches a glass of water, it *refracts* (bends).